<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="style.css">
  <title>进度条</title>
</head>
<body>
  <div class="container">
    <div class="progress_container">
      <div class="progress" id="progress"></div>
      <div class="step active">1</div>
      <div class="step">2</div>
      <div class="step">3</div>
      <div class="step">4</div>
    </div>
      <button class="btn" id="prev" disabled>上一步</button>
      <button class="btn" id="next">下一步</button>
  </div>
  <script src="script.js"></script>
</body>
</html>